Thread-controlling mechanism for embroidery-machines.



'A. c. ZENORiNI. THREAD CONTROLLING MECHANISM FOR EMBROIDERY MACHINES.

APPLICATION FILED FEB. H, I

Patented Dec. 17 1918.

' IN V EN TOR.

I TNESSES A. C. ZENORINI.

THREAD CONTROLLING MCHANISM FOR EMBROIDERY MACHINES.

APPLICATION HLEU FEB 11. L916.

11,288,369, Patented Dec. '17, 1918.

2 SHEETS-SHEET 2.

WITNESSES INVEN TOR.

ATTORNEY UNITED STATES PATENT OFFICE.

ANDREW C. ZENORINI. OF "WEST HOBOKEN, NEW JERSEY.

THREAD-CONTROLLING MECHANISM FOR EMBROIDERY-MACHINES.

Application filed February 11, 1916.

dent of lVest Hoboken, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Thread-Controlling Mechanism for Embroidery-Machines, of which the following is a specification.

This invention relates to improvements in thread-controlling mechanism for embroidery machines.

By the use of my invention I produce a tensioning lock bar having a guide for each thread and providedrwith means adapted alternately to grip and release each individual thread or end, whereby each individual thread may be fed and tensioned to the embroidery implements independently but without separate manipulation so that when one series of needles are thrown into operation or operative position and another series are thrown out of operation or into reserved position, the operating series may be fed without unthreading the reserve needles and without separately manipulating a series of locking or friction disks. Furthermore each individual end or thread willbe guided and retained in its proper position relatively to its neighbors irrespective of the position or planes of movement of the working implements through which the particular thread is being fed. 7

Another feature of my invention is the provision in look bars of the type herein described of means for preventingthe crushing of the reservedor stationarythreads by the repeated operation of the locking bar thereon during its movement to alternately grip and releasethe moving threads which are being fed to the needles.

Another feature of my invention .is the provision intermediate the embroidering implements and the locking bar of a plurality of take-up bars adapted to be simultaneously moved toward and away. from each other to alternately take-up and loosen the thread, each of which bars is provided with a series of vertical anti-tangling flanges separated by a series of elongated vertical slots whereby a separate or ind ependent guide groov for each individual thread or end is provided, so as to retain each individual thread in suitably spaced relation from its neighbor to prevent the tangling of the threads which in devicesof Specification of Letters Patent.

Patented Dec. 1 '7, 1918.

Serial No. 77,740.

the type hereinbefore referred to would be likely to occur in view of the great number of threads or ends employed.

Furthermore, I preferably provide at the head of each elongated vertical slot a hair spring so arranged as to permit the easy entrance of a thread into said slot but to retain the same therein and prevent accidental slipping out of said thread there from during the loosening of the thread by such tensioning bars.

In the accompanying drawings in which similar reference characters designate corresponding parts throughout the several views,

Figure 1 is a rear elevation partially broken away of a threadlocking device and operating parts included in my invention;

Fig. 2 is plan view partially broken away of said thread locking device;

Fig. 3 is a front elevation partly broken away of said device;

Fig. 4 is a section on theline 44t of Fig. 1, illustrating the thread looking or thread gripping position of. the component bars of said thread locking device;

Fig. 5 is a section similar to Fig. 4, illustrating the unlocked position of the component bars of said device;

Fig. 6 is a section on the line 6-6 of Fig. 1 and also illustrates my improved anti-tangling take-up bar;

Fig. 7 is a side elevation of one of the take-up bars shown in Fig. (3.

Referring now to these drawings which illustrate a preferred embodiment of my in- .vention, 1 indicates a base or table bar, preferably stationary, and supported in any suitable way from the frame of the machine and 2 indicates a bar preferably composite in structure, movable in relation to the bar,

tending parallel to said. plate and rotated ,g from any suitable source of power not.

shown. Said plunger is retained in contact with said cams 16 by springs 17, which abut at one. end against the stationary bearing 15 and at the other end against any suitable abutment (not shown) on the plunger 14.

To the tar is suitably secured a bar '?lhaving an alining flange l along its lower marginal edge and said bars 3 and l being secured together by screws5 or in any other suitable manner. throughout its length with a series of thread guiding slots 3 dividing the upper half of said bar into What I shall term sections 3, and the bar is provided with a series of alternate openings 49 and upward extensions l, the extensions 46 extending upwardly above the bar 3 and abutting against alternate sections 3 or" the bar 3 Said bar i is also provided with a series a horizontally disposed blocks 6 mounted at the upper edge thereoi and suitably supported by webs T. Said abutting blocks 6 extend forwardly to overhang the bar 1 and extend laterally on opposite sides of the web so as to overhang slots 3? on opposite sides of the web 7 and are so disposed in relation to each other as to form thread channels 8 be tween contiguous blocks.

To the under surface of each of such blocks is secured two pairs of springs 9 and 10 respectively which are secured to said block 6 in vertical alinement with the slots 3 by means of screws 11 or in any other suitable manner. Obviously, it a thread is passed downwardly through the channels 8 and thence moved horizontally under one end of the block 6 and into a slot 8 it may be positioned directly beneath springs 9 and 10 and it the bar 3 is reciprocated vertically in relation to the bar 1 the pressure will be alternately relieved from and applied to the springs 9 and 10 which will be causer to alternately grip and release the thread 12.

The spring 10 is preferably made of thinner metal and more resilient than the spring 9 and is, when the bars 1 and 3 are separatech so bent as to press with a yielding pressure upon the thread 12 and the spring 9 is disposed in alinement above said spring 10 so that when the bar is moved. downwardly in relation to the bar 1 it will cause the thread gripping pressure to be gradually though firmly applied to the spring 10 and through it to the thread 12, whereby all chopping or crushing of the thread i'iber prevented While at the same time the thread is alternately securely gripped so as to securely lock the thread against movementand yieldingly retained so as to permit the feeding. of so much only of said thread as is drawn through the locking device by the tensioning device, and this result is accomplished even though a predetermined part of the thread be retained in stationary positionwithin said locking device for a considerable period of time as is the case inored threads are beingemployed and, in

which one or more series of threads thrown out of operation while other series The bar 3 is provided .7

1,ess,3ee

oi threads are in operation or being, ted to the embroidering implements;

In Figs. 6 and 7 I haveshown my combined locking and yielding tensioning device in combination with novel take up bars which are mounted as shown to rock simultaneously toward each other to loosen the thread so as to permit feeding and s mul- V taneous rocking in the opposite direction to take up the thread. These take-up bars are of similar construction and each offlthem comprises vertical arms 18-at opposite ends of and suitably secured upon a horizontal shaft 19 by means or collars 18?- The arms 18 at their upper end are provided with collars or sockets 18 into which is fitted a cylindrical bar 20 which is provided with a series of vertically extending flanges 21 so disposed in relation to each other as to provide elongated thread slots therebetween and each flange has suitably secured thereto as with screws 24 a hair spring 23 which extends laterally and closes thetop of a slot 22. These hair springs are so inclined and bent as to' permit the ready entrance of a thread into a slot 2-2- but to prevent the ac cidental sli nin out of such thread when i r: p

ing of the thread and the alternate gripping, V,

and releasing thereof by the locking bars but also prevents a tangling due to the overteeding of thread through the locking device.

Havingdescribed my invention, I claim:

1. A locking and tensioning device for embroidery machines'embodying two relatively vertically movable members extending horizontally and adapted to separate and close together, a fiat spring mounted on one of, said members in registry with each thread and adapted to gradually transmit the 010s ing pressure of said movablememloers to the thread. i

two relatively vertically movable members extending horizontally and adapted to separate and close together, a fiat spring in registry with each thread and connected at one end with oneof said movable members and free at its oppo-. site end, the said flat spring being adapted to gradually transmit the closing pressures of said movable members to the thread.

3. A locking and tensioning device/for embroidery machines embodying two ,members adapted to se arate and close. together, means for guiding a series of threads through such members andsprings connect: ed toone of said members in .alinement with broidery machines embodyin said thread guiding means and yieldinglpr. pressing aga nst'the othermember to provide" a yielding tension on the threads hile the.

bars are .sep arated" and tollpr'eventicrushing V of the threads upon the closing of said bars;

a. A locking and tensioning device for @111? l. Locking and tensioning devices for em broidery machines embodying a stationary member and a member movable into and out of thread pressing relationship with said stationary member, the said members extending horizontally and one of the same being provided with thread-guiding slots, a series of springs in alinement with said thread guiding slots and mounted on said movable member to prevent crushing of the threads upon the closing movement of said members.

5. Locking and tensioning devices for embroidery machines embodying a stationary member and a member movable into and out of thread-pressing relationship with said stationary member, the said members eX- tending horizontally and one of the same being provided with thread-guiding slots, and a series of springs mounted on the movable member in alinen'ient with the thread guiding slots and yieldingly pressing against the stationary member when the movable and stationary members are out of thread-pressing relationship. as and for the purpose specified.

(5. Locking and tensioning devices for embroiderv machines embodying a stationary member and a member movable into and out of thread-pressing relationship with said stationary member, the said members extending horizontally and one of the same being provided with thread-guiding slots, a series of springs mounted on the movable member in alinement with the thread guiding slots and yieldingly pressing against the stationary member and another spring registering with the first mentioned spring'to cause the closing pressure of the movable member to be more gradually applied to said first mentioned spring and through it to the thread.

7. A looking and tensioning device for embroidery machines embodying therein a table member retained in stationary position and a vertically movable member having an overhanging part. the said members extending horizontally and one of the same being provided with threadguiding slots, means for moving said overhanging part alternately into and out of thread-pressing rela tionship with said table member and a series of springs secured to said overhanging part in alinement with said thread slots.

8. A. locking and tensioning device for emln'oidery n'iachines en'ibodying therein a table member retained in stationary position and a vertically movable member having an overhanging part, the said members extending horizontally and one of the same being provided with thread-guiding slots, means for moving said overhanging part alternately into and out of thread-pressing relationship with said table member, a series of springs secured to said overhanging part in alinement with said thread slots and yieldingly pressing against said stationary member when the members are in separated position, and another series of springs registering with the first mentioned springs to cause the movement of the movable member to be gradually transmitted to said first mentioned spring as and for the purpose set forth.

9. A locking and tensioning device for embroidery machines embodying two horizontally-disposed and vertically movable members adapted to separate and close together, means for guiding a series of threads through such members and a take-up memher having a series of upstanding anti-tangling flanges separated by a series of elongated vertically extending slots.

10. A locking and tensioning device for embroidery machines embodying two horizontally-disposed and vertically movable members adapted to separate and close together, means for guiding a series of threads through such members, a take-up member having a series of upstanding anti-tangling flanges separated by a series of elongated vertically extending slots and a series of yielding springs arranged to close the tops of said slots to retain the threads therein against accidental displacement.

11. A locking and tensioning device for embroidery machines embodying therein a table member retained in stationary position and a vertically movable member having an overhanging part, the said members extending horizontally and one of the same being provided with thread-guiding slots; means for moving said overhanging part alternately into and out of thread-pressing relationship with said table member and a series of springs secured to said overhanging part in alinement with said thread slots and \"ieldingly pressing against said stationary member when the members are in separated position.

In testimony whereof, I have signed my name to the foregoing specification in the presence of two sub-scribing Witnesses.

ANDREW C. ZENORINI.

Witnesses Josnrn F. OBnmn, SILvro ZENORINI.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

